Built like a tank, Color / Contrast, Push / Pull Zoom, Well ballanced, Sharp throughout the range.

Cons:

Hooked me into L quality lenses!

This was my first L lens. I've had it for almost a year now and it has performed flawlessly. This shares about equal time on my camera with the 24-70L. The pictures I get from this lens continue to amaze me. With the IS, I can get sharp images from this lens even with slow shutter speeds. I now have 4 L lenses and this one is still my favorite.

I bought this lens to replace my Canon 28-135 IS USM. After buying a 100-400L IS USM, I was never quite happy with the results from the 28-135. The 24-70L has fulfilled this roll+. The color / contrast really make my pictures POP. Highly Recommend!